ATI Radeon HD 3850 X3 vs ATI Radeon HD 3870 X2
What is the difference between ATI Radeon HD 3850 X3 and ATI Radeon HD 3870 X2. Find out which graphics card has better performance.
Graphics Processor (GPU)
| RV670 | GPU Name | R680 |
| RV670 PRO (215-0708003) | Model number | R680 XT (215-0708017) |
| TeraScale | Architecture | TeraScale |
| TSMC | Foundry | TSMC |
| 55 nm | Process Size | 55 nm |
| 666 million | Transistors | 666 million |
| 192 mm² | Die Size | 192 mm² |
Graphics Card
| Never Released | Release Date | Jan 26th, 2008 |
| Radeon R600 (HD 3800) | Family | Radeon R600 (HD 3800) |
| End-of-life | Production | End-of-life |
| Radeon R500 PCIe | Predecessor | Radeon R500 PCIe |
| PCIe 2.0 x16 | Bus Interface | PCIe 2.0 x16 |
Memory
| 512 MB x3 | Memory Size | 512 MB x2 |
| GDDR3 | Memory Type | GDDR3 |
| 256 bit x3 | Memory Bus | 256 bit x2 |
Clock Speeds
| 850 MHz 1700 Mbps effective | Memory Clock | 901 MHz 1802 Mbps effective |
| 669 MHz | GPU Clock | 825 MHz |
Render Config
| 16 x3 | TMUs | 16 x2 |
| 16 x3 | ROPs | 16 x2 |
Board Design
| 292 mm 11.5 inches | Length | 267 mm 10.5 inches |
| 145 W | Thermal design power (TDP) | 165 W |
| 300 W | Suggested PSU | 450 W |
| 4x DVI | Display Connectors | 2x DVI 1x S-Video |
| 1x 8-pin | Power Connectors | 1x 6-pin + 1x 8-pin |
API support
| 10.1 (10_1) | DirectX | 10.1 (10_1) |
| 3.3 (full) 4.0 (partial) | OpenGL | 3.3 (full) 4.0 (partial) |
| N/A | OpenCL | N/A |
| N/A | Vulkan | N/A |
| 4.1 | Shader Model | 4.1 |